Loom.



J.v E. YARBROUGH.

Loom.

`APPLICATION FILED AUG. 7, 1911.

Patented Dee. 1'?, '1912.

2 sHnnTssHEET r;

5mm/nto@ @Hime/9 J. E. YARBROUGH.

' LOOM.

v APPLIOATIONEILED AUG. 7, 1911.

1,047,363. Patented Dec. 17, 1912.

2 SHEBTS-SEEBT 2.

@Ibi/imams 3 Qi/QW JOHN n. YARBnoUGn'-, or- ATLANTA, GEORGIA.

Speiiicaaon of Letters raients ratentedl'pec. M, i912. Applicationfiled-'August 7, 191.1. Serial No. 642,627. i

To all 'whom it may concern: g

`Be itknown that I, JOHN E. YAeBnoUGn; acitizen of the United States,residing at' Atlanta, in the county -of Fulton and State' ofGeorgia,'have invented certain new and4 and I do useful Improvements'fin Looms; hereby declare the following to be a f ull, clear, and eXactdescription of the invention, such as will enable others skilled in theart to Which it appertains to make and-use the same, reference being hadto the accompanying drawings, and to letters'or figures of referencemarked thereon, which form a part of this specification.

This invention relates generally to improvements in looms, and moreparticularly to a pick motion wherein ,an automatically createdandcontrolled partialvacuum and subsequent restoration ofatmosphericpres'- sure is :utilized as a motive power for the shuttle. Y

.The main object of the present invention is the automatic creation andcontrol of a vacuum inthe pick motion mechanism and the arrangement .ofmechanical parts to cause the normal atmospheric pressure to act as amotive vpowerfor the shuttle upon the release of the-vacuum'holdingmeans. A .further Vobec't of the invention is the arrangement of .avacuum creating means with such relation ltothe moving parts'of f theloom structure as to cause the vacuum-2' created, or being created, toact as a posltive, thoughfresilient,- brake to the loom in breakage orother interference Withthe proper loom movement.

V `The invention in the preferred .form of details will be described inthe following speciiication, reference. being had particu larly to theaccompanying drawings in which Figure 1'is' a top plan view illustratingthe shuttle operating means at one end of the lay. Fig. 2 is a verticalsectional view of the'same on theline 2-2 of Fig. 1. Fig.

3 is a section on the line 3-3 of Fig. 1. Fig.. 4 is a section on theline 4-4 of Fig. 1. Fig. 5 is a broken 'plan showingconnection be-Atween the crank shaft and the shuttle opere' ating means; Fig. 6 is adetail view,l

Referring -particularly i ing drawings,`1'represents the layand 2'theshuttle box, 'which together with the co operating parts of the loom,eXceptjfor the specific details hereinafter noted, willgbe in-conventional or preferred type of structure reception of a cap 1 willpresently appear.

' end-:f the shuttle.

to the accompany?,

for they purpose designed, there being no',v

and formed integral formed with a circumferential or otherwiseA arrangedseries of elongated openings for a purpose which Within the cylinder isarranged 4in any desired air-tight manner a piston (Shaving a' centrallydisposed, removably connected, hollow stem 7 the forward'or inner endo-f which projects through a stuiiing-box 8 in the forward orinner wallof thejcylinder, in lineJ with the. shuttle,

"limitation in this'respectin connection with.

the present invention. i 'f At one end ofthe lay therewitlror separatetherefrom asmay be. desired, is acylinder 3, open atvitsfree or outerend and eXteriorly threaded for the within theadjacent box. The forwardor.-

inner endgof the s temis connected to an operating bar 9,`t he mainlength of which operates'in a slide-way 10 inthe bottom of the box,directlybeneath theshuttle, such main length `being formed v'with anupturned rear end 11 directly connected to the piston stem. The rear orAouter end 'of the hollow stem is", interiorlythreaded at 412-toadjustably 'receive a stop plug 13 which plug forms an abutment for oneendl ofl a coil spring 14 housed within thel stem andbearing at itsopposite end against a 'buffer-"rod 15, the forward or. inner end 'ofiwhich projects 'through and beyond the'forward endgof the hollow stem,being' preferably 'movable through a guide sleeve.16 removably; securedin the forward end of'thestem."The'ffor lWardend of thebuferrod projectsthrough the portion 11 ofthe4 operating bar-and is provided -therebeyond.w1th a more vor less flexible buffer disk 17 centrally formed at 18 tocor-respond withfthe formation of the sioned asfto normally maintain thebuffer disk 17' linwardly"spaced from 'contact with the portion 11 ofAhe' operating bar, vfora purpose which will later appear.

The spring 14 is so ten- Secured on the lay vata point adjacent thecylinder S is a bracket 19 provided with la stub shaft orv pintleQO.Pivotally mount@ -ed on the pintle 2:0' 'is asetting leverQl, havinglits .inner or.longer end 22 of such length .that its free terminalprojects into the channelgjl() in position'to engage the end of thelopera'tingbar. AMounted onthe pintle 20 'outwardly'beyond thesetting'lever .21 is an operating lever4 23,"tvh'ich lever in that por#tion encircling the pintle is formed with an ofv the latch.

upstanding sleeve 24 having a camu-way or groove 25 formed therein. yThat portion of the operating lever 23 [overlying the setting lever 21is formed with spaced depending] pins 26, said pins being arranged onopposite sidesof the pivot pintle and so disposed that when "theoperating lever is in Contact with the setting lever and is moved in onedirection, the pins 26 of the'operating lever will contactVwithth'esetting lever, and'- in edect,-lock said levers together foi;simultaf neous operation in one direction, as will be plain from .'Fig.1 ofthe drawings. l

'Secured upon the upper end of the pintle `20 is a disk 27 formed atanappropriate 31ZL represents, the crank shaft of the loom` having ltheend adjacent the shuttle box providedwithi a crank -32 to which by auniversal connection 33 there is connected one end of .an operating rod34, the opposite end of which ,is connected by an appropriateconnectionto the free or-outer. end of the operating lever 23. f

Pivotally supported upon the lay immediately adjacent the .bracket y19is a latch 35 designed and formed at its free end to engagethe settingrlever 21 when the latter has been movedto its operative position, aswill later appear, and adjustably supported upon the operating lever isa release dog 36 which,

when the respective setting and operating levers are in normalpositions, thatv is in contact, is on a plane below and outof the pathIf. found necessary I contemplate providingvthe cylinder 3 at the-inneror lay end with a bypass 37 controlled by a needle valve 38, whichbypass'servesto admita small vipiantity'of'air in the vacuum end of thecylinder in the formation of the vacuum, whereby to cushion thepiston-in its opera'- f .-tive movement.

In describing the practical operation of my invention, the positionofvarious partsy is given with relation to the position of the crankshaft, or upper shaft, of the loom.`v

The positions of the crank on this shaft are divided into four pointsinthe circle in which ,it travels, and these points are known ascenters, as for example, top center which is the extreme high point ofits travel.

Power is derived from the. crank shaft 31' of the loom in connectionwith the forward movement of the lay. As thev lay moves from theposition known as bottom cen..

ter to the position known as forward ;tionary relative to the lay,thereby causing the forward movement of the lay through theinstrumentality of the swivel nut 33, and

connecting rod 34, to move the operating lever 23, in a :direction tocarry'the pins 26,

against the setting lever 21, so as to move the latter in a direction toforce `the-piston 6, outwardlyfinthe cylinder 3, and create avac'ul'inr'fin the inner end of said, cylinder whereupon the latchv 35will engage said lever andv hold the Asame until the vproper time forthrowing the shuttle. f

It is to be borne in mind that the shuttle is thrown from theleft-handend of the lay (as viewed in the drawings) to the 'righthand end andback again during one cornplete cycle of Aoperations and during whichthe crank shaft 31,a makes two complete revolutions. ,On the firstrevolution the piston 6, is forced back and latched, and` on the secondrevolution the latch 35, is released by the adjustable dog36, thusallowing the piston 6, to throw the shuttle across thellay. It is ofcourse understood that there isa'n of the lay that throws it back.

Having already described the operation of forcing the piston backandholdingitl until exactly similar mechanism on the other end theproper time for releasing it, I shall now describe the operation ofreleasing the latch 35 so as to permit the piston to act. As the lay inits movement proceeds from" the top center toward the bottom center, theoperating lever 23, moves in a direction toward the lay while thesetting lever 21,v and its con-Y comita'nt parts remain stationary. Asthe lay moves from this position the lever 21 again .swings out from thelay and during this movement the cam groove 25 of the s sleeve 24, whichis part of the operating los lever 23, comes into registry with the pin28, of the disk 27, that is held down and back by the spring 31.Consequently the sleeve 24, will ride on said pin, thereby raising thelever 23, so as to cause the pins 26 to clear the lever 21, while by thesame movement the dog'36, will be brought into the path of the latch 35,and -release the latter, permittin the piston '6, to act to throw theshuttle. isvto be particularly remembered that 'on this movement of thelever 23, outward away from the lay, the setting lever is not engaged bythe pins 2G, having already been moved to its s et or piston holdingposition, while on the previous movement of the lever 23 in the samedirection, that is, away from the lay, the levers 23 and 21 were lockedtogether by said pins, whereby the sleeve24, when itsslot 25 registeredwith the pin 28, could notL ride upwardly, owing to the frictionalresistance maintained between the pins 27 andthe lever 21.v Hence,

iso

28 to turn with it instead of the cam riding' thereon. In other words,the reason why the sleeve 2 4`does not rise and receive'the pin 28 intothe slot 25L of the sleeve in this movement, is because the pins-26l are"engag- Y the lever 21, and consequently, v A2o 'will receive the ingthe lever 21 with sufficient-'friction vor binding action to prevent thesleeve and lever 23 from moving upwardly `o`n'- the pintle 20, andconsequently, afterthe sleeve 24 turns to a position .where the. pin 28will engage one wall of the slot 25 at the upper end of the latter, thespring 31 will merely yield and the disk 27 will be forced around. Inthe other movement of the lever 23 outs ward or away from the lay, thereis, .of course, no engagement of the 'pins 26 with when the slot orgroove 25 reaches the pin'28,'the groove lever 23 will ri e upwardly,whereby the dog 36 will be brought into the path: of the latch 35 andlrelease the latter, permitting thepiston 6 to act to throw the shuttle.

As previously described the mechanicall 'bi'iifer-p-rovided by the buferrod 15, the

4spring 1 4 and the buer disk 17 is normally f' disposed in spacedrelation to the portion v1 1 of the operating rod.

the shuttle is shot into `the box, this buffer actsas a check to theshuttle and. at the Sametime, by compression on the spring, storesup a'small amount of power for throwing the shuttle in the oppositedirection.

From the above description it will-be seen that either a forward orbackward n io-A tion of the lay from the bottom center 'tends to set thepiston 6 thereby forming a vacuum in the cylinder during either of saidmove ments. 4This i'n addition to storing ipower for ldrawing theshuttle tends to utilize the" va'cuum l'as' al positive lthoughresilient brake to stop theloom incidentally in the event of breakage'or other interference in its operating parts which would'otherwise tendto an undesirable diminution-of speed. There is 1 an added vadvantage inthe use of the vacuum utilize toa overcoming as wouldtend to stop thelay as.- 'a brake,

which is' the on the bottom center position,

correct position for replacing weft orf draw- Furthermore,. as the -laymustbe stopped dead and* restored at'the front of the loom, at whichtime the pist-on ing in threads.

is being forced back, this must necessarily the inertia of'the la-y asit is f stopped and storing the same up forthr'ow- Aing the shuttle.

This insuress'mooth run-. ning by removing strain from rocker arms andstraps which actuate thelay. The power utilized forvtlie pickmotion 'isgathered' throughout approximately a half' revolution on the crank shaftand thus in and the sleeve 2 4, and

Therefore, when pheric pressure,

large extent the'powerlost in,

gradually provided for instead of suddenly as in the present typeI ofpick motion. y It is of course to-ber understood as'before stated thatthe mechanism herein described is duplicated at the opposite end of thelay in exactly similar arrangement and disposition,`and that asdescribed the improvenient involves a material decrease in the lnumberof movingparts of the usual pick motion, insures a smoother running ofthe loom and permits the parts to`be made of metal or, otherindestructible material withoutl disadvantage.

The outer endv of the cylinder may be open but I preferablyemploy thecap with the elongatedopenings 'to form a muffler. Obviously when thecapis used, the noise due to the action of the air, will be greatlyreduced, l

Having thus described the invention, what is claimed is 1. `1n 'a pickmotion for looms, a shuttlethrowing' element, means for holding saidelement in set position for operation under "atmospheric pressure, andmeans for auto.-l

matically releasing said'holding means to permit the restoration ofatmospheric pressure forr the purpose specified.

2. In a pick motion for looms, a shuttle throwing element, meansoperat-ing on said element to create. sub-atmospheric pressure and tohold said element in set position for operation under atmosphericpressure, means for automatically releasing said `sub-atmosphericpressure-creating means, whereby to*l permit surea and means forautomatically actuating the shuttle throwing element upon the4restoration of said 4atmospheric pressure,l for the purpose specified.l

therestoration of atmospheric -pres- 3. 1n a pick motion for lo-ins, ashuttle throwing element, apiston Aoperatively con-4 nected thereto,aicylinder in which saidA pis! ton is mounted, means for automaticallymoving said element in a'direction to'create sub-atmospheric.pressure-on one side of said piston and for holding the sainein set po` sitionfor operation under atmospheric pressure, meansforautomatically.releasing the sub atmospheric .pressure ,f creating,means whereby to permit the restoration of atmosand means forautomaticallyv ,actuating the shuttle-th rowing element upon4the-restoration of said atmospheric pressure for thepurpose specified.

4.' A. -loom -pick motion, a power means therefor including a cylinder,a piston in vsaid-cylinder, l mechanism actuated in the movement oftheloom to form a vacuumv in saidcylinder acting against said piston, and[125l means to release the piston at-fal predetery mined time.

"5. .Aj loom therefor vlincluding a cylinder, c'operatiiig Vleversoperated in the movement of theloom,

'pickmotioin a power means means intermediate said levers vand cylinderto form a vacuum in the latterin a certain operation of theform'er,\said means including a piston," and means operated in themovement lof the loom at a predetermined time to release the piston. j

6. A pick motion for looms, and an operating mechanism therefor,said'mechanism including a cylinder, a pistontherein, a setting lever tomove the piston in Aone vdirection to form a vacuum within the cylinder,an operating .lever to operate thes'ett-ing lever, and means actuated bythe operating lever to release the piston.

7. A pick motion for looms and an operating mechanism thereforincluding` a cylinder, a piston therein, a setting leverto move thepiston inv one direction to form a va'cn'um within the cylinder, meansto lool; the setting lever in vacuum maintaining position, an operatinglever toengage and actuate the sett-ing lever when said operatingleveris'moved in one direction, and a connection between "the operating leverand a moving part of the loom structure.

8. A pick motion for looms `and anI operating mechanism thereforincluding a cylinder, a-piston therein, arsetting lever to move theiston in one direction to form a vacuum within the cylinder, means tolock the settingA lever in vacuum maintaining position, an operatinglever, means for locking said operating lever to the setting lever inthe movement of the operating lever in one direction from a given point,means automatically operated in the movement ofthe latter lever to spacethe same from the setting, lever to prevent the locking of said levers,whereby to free the operating lever from the setting lever, and meansactuatedb'y the operating lever to release the vacuum forming lock ofthe setting lever .during movement ofthe operating lever under theinfluence of the spacing means.

. 9. In a pick motion for looms and an operating'mechanism therefor,including a cylinder, a Apiston therein, a settinglever, an operatinglever arranged to move the setting lever in a direction to force thepiston outwardly in the cylinder tocreate an abnormal air lfpressure',means for locking the setting lever in this position, meansl permittinga subsequent movement of the operating lever inthe same directionwithout affecting the setting lever, and means operable for apredetermined period in the operation of the loom by and upon themovement of the operthe setting lever.

ating lever to vrelease the holding means of 10. A pick motion for loomsand an operating mechanism therefor, includinga cylinder, a pistonrtherein, a setting lever arranged to move the piston in the cylinder ina direction to create an abnormal air pressure therein, means forlatching the setting lever in its operative position, an operating levermovable about the same pivot with the setting lever and provided withpins engageable With the setting lever to move the latter, means formoving the operating lever in a definite plane lto operate the secondlever, and means for automatically moving the operating lever in anotherplane whereby the pins of said lever will clear the setting lever, and areleasing device carried by said operating lever and movableintoengage-v mentl with the latching means of the settinglever torelease the latter in the second named movement of the operating lever.

1l. A pick motion for looms and an operating mechanism therefor,including a cylinder, a piston therein, a setting lever arranged to movethe piston in a direction to create sub-atmospheric pressure in-thecylinder, an operating lever provided with a lsleeve formed with a camrecess, a spring pressed pin movable into said. recess, means carried bysaid operating lever to engage the setting lever to move the latter in adirection to force the piston in the cylinder as hereinbefore specified,means for lat-ching the setting lever, and a dog carried by theoperating lever and arranged to engage the latching means torelease'thesame upon the movement of the pin into the cam recess of saidsleeve. A

12. In a pick motion for looms, power means, a shuttle operatingmechanism therefor, said operating mechanism including` two elements,one fitting within. the other and one of saidl elements being operatedby the power means toform a vacuum between both .said elements, andautomatic means for releasing the vacuum to cause one of the elements tooperate a shuttle.

. 13. In a pick motion for looms, aA shuttle throwing elementperiodically operated,

means for forming a vacuum for operating.

the shuttle throwing element, and an automatic tripping device forreleasing the vacuum into operation.

In testimony whereof I have signed my' name to this specification inthe. presence of 'two subscribing witnesses.

JOHN E. YARBROUGH. Witnesses:

CLIFTON CORLEY,

W. W. CRLEY.

